WO2013097630A1 - Method, node, and system for selecting target cell - Google Patents

Abstract

The present invention relates to the technical field of communications. Disclosed are a method, node, and system for selecting a target cell, capable of selecting as the target cell for a user equipment (UE) a candidate cell reaching a predetermined standard of signal quality. The method of the present invention comprises: transmitting a measurement instruction to the candidate cell, wherein the measurement instruction is used for instructing the candidate cell to measure the uplink signal quality of the UE (101); receiving the measurement result transmitted by the candidate cell, and determining the target cell on the basis of the measurement result (102). The present invention is mainly for use in a UE handover process.

Description

 Method, node and system for selecting a target cell The application is submitted to the Chinese Patent Office on December 30, 2011, and the application number is

The priority of the Chinese patent application entitled "Method, Node and System for Selecting a Target Cell" is incorporated herein by reference.

Technical field

 The present invention relates to the field of wireless communications, and in particular, to a method, a node, and a system for selecting a target cell.

Background technique

 The wireless communication field is under pressure from the explosive growth of data services. In order to improve network capacity and reduce transmission costs, the industry has proposed a heterogeneous network (Hetneteous Network, Hetnet) technology. The Hetnet is composed of a plurality of cells of different sizes and types, including: a macro cell and a micro cell. The micro-class cell includes: a micro cell, a pico cell, a Femto cell, and a remote radio head (RRH). By deploying more micro-class cells for traffic-intensive areas, the network capacity of the area can be effectively increased, and the micro-class cells are smaller in size, their construction costs (Capital Expenditure, Capax) and operating costs (Operating Expense, Opex). ) are relatively low, so Hetnet is valued by many operators and is an important direction for the evolution of wireless networks.

 In the prior art, when a UE wants to switch from a macro cell to a micro cell, due to the traditional user equipment

(User Equipment, UE) does not have the ability to read the information of the neighboring cell system. It can only report the scrambling code of the target cell to the source control, but does not report the target cell identity. However, the number of micro-class neighboring cells of the macro cell is large, and the scrambling code available for the micro-cell is limited, so multiple micro-cells are likely to reuse the same scrambling code.

 ( Primary Scrambling Code , PSC )

Therefore, when the target node receives the scrambling code of the target cell, the scrambling code may correspond to multiple micro-class cells, and the target cell cannot be determined. The source node compares the scrambling code with the scrambling code of all neighboring micro-class cells, and sends a link establishment request message to one of the micro-class cells matching the scrambling code, which may cause handover to the wrong cell, which is difficult It is guaranteed that the UE is successfully switched to the target cell with higher signal quality. Summary of the invention

 Aspects of the present invention provide a method, a node, and a system for selecting a target cell, which are capable of selecting a target cell with a higher signal quality for the UE.

 An aspect of the present invention provides a method for selecting a target cell, which is applied to a target node side, and includes: sending a detection indication to a candidate cell, where the detection indication is used to indicate that the candidate cell detects an uplink signal quality of the user equipment UE;

 And receiving a detection result sent by the candidate cell, and determining a suitable target cell according to the detection result.

 Another aspect of the present invention provides a method for selecting a target cell, which is applied to a base station side, and includes: receiving a detection indication sent by a target node;

 Detecting, according to the detection indication, an uplink signal quality of the user equipment UE;

 Sending a detection result to the target node.

 Another aspect of the present invention provides a method for selecting a target cell, which is applied to a source node side, and includes: sending a handover request message to a target node according to a measurement report reported by the UE, where the handover request message includes a detection indication.

 Another aspect of the present invention provides a target node, including:

 a detecting unit, configured to send a detection indication to the candidate cell, and receive a detection result sent by the candidate cell, where the detection indication is used to indicate that the candidate cell detects an uplink signal quality of the user equipment UE, and the cell determining unit is configured to The detection result received by the detecting unit determines a target cell. Another aspect of the present invention provides a base station, including:

 a receiving unit, configured to receive a detection indication sent by the target node;

 An uplink detecting unit, configured to detect an uplink signal quality of the user equipment UE according to the detection indication, and a feedback unit, configured to send a detection result to the target node.

 Another aspect of the present invention provides a source node, including:

 The handover requesting unit is configured to send a handover request message to the target node according to the measurement report reported by the UE, where the handover request message includes a detection indication.

 Another aspect of the present invention provides a system for selecting a target cell, including: a target node, a base station, and a source node;

The source node is configured to send a handover request message to the target node according to the measurement report reported by the UE, where the target node is configured to send a detection indication to the candidate cell, and receive a detection result sent by the candidate cell, where the detection indication is Used to indicate that the candidate cell detects the uplink signal quality of the user equipment UE A quantity; determining a target cell according to the detection result;

 The base station is configured to receive a detection indication sent by the target node, detect an uplink signal quality of the user equipment UE according to the detection indication, and send a detection result to the target node.

 The method, the node and the system for selecting a target cell described above, by causing the candidate cell to detect the uplink signal quality of the UE to be changed, and selecting a candidate cell whose signal quality reaches a predetermined target from the candidate cell according to the detection result, as the target cell, and Compared with the method for arbitrarily selecting one of the candidate cells as the target cell in the prior art, the success rate of the handover can be improved, and the target 'region with higher signal quality can be selected for the UE.

DRAWINGS

 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the actual examples or the description of the prior art will be briefly described below. Obviously, the following description is attached. The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without the publication of creative labor.

 FIG. 1 is a flowchart of a method for selecting a target cell according to an embodiment of the present invention;

 2 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 3 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 4 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 FIG. 5 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 6 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 FIG. 7 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 FIG. 8 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 FIG. 9 is a flowchart of a method for selecting a target cell according to another embodiment of the present invention;

 FIG. 10 is a schematic diagram showing the composition of a target node according to another embodiment of the present invention; FIG.

 11 is a schematic diagram of a composition of a target node in another embodiment of the present invention;

 FIG. 12 is a schematic diagram of a composition of a target node according to another embodiment of the present invention; FIG.

 13 is a schematic diagram showing the composition of a target node in another embodiment of the present invention;

 14 is a schematic structural diagram of a base station according to another embodiment of the present invention;

 15 is a schematic structural diagram of a base station according to another embodiment of the present invention;

 16 is a schematic structural diagram of a base station according to another embodiment of the present invention;

17 is a schematic structural diagram of a source node according to another embodiment of the present invention; FIG. 18 is a schematic structural diagram of a system for selecting a target cell in another embodiment of the present invention.

detailed description

 BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

 The techniques described herein can be used in a variety of communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA, Code Division Multiple). Access system, time division multiple access (TDMA Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Frequency Division Multiple Addressing (OFDM) system, Orthogonal Frequency Division OFDMA (Orthogonal Frequency-Division Multiple Access) system, single carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) system, and Other such communication systems.

 Various aspects are described herein in connection with a terminal and/or base station and/or base station node.

The user equipment, which may be a wireless terminal or a wired terminal, may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal The computers, for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), etc. . A wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, Remote Terminal, Access Terminal, User Terminal, User Agent, User Equipment. ₄ A base station (e.g., an access point) can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.

 The base station controller (source node or target node) may be a base station controller in GSM or CDMA (BSC, base station controller l may also be a radio network controller (RNC) in WCDMA, and the present invention does not Limited.

 In addition, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this article is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

 An embodiment of the present invention provides a method for selecting a target cell, which can be applied to a source node side, as shown in FIG.

 101. Send a detection indication to the candidate cell, where the detection indication is used to indicate that the candidate cell detects the uplink signal quality of the user equipment UE.

 The detection indication may be sent by using a dedicated detection message before the target node establishes a radio link with the candidate cell; or may be sent by the first link setup request message during the process of establishing a radio link between the target node and the candidate cell. . The candidate cell may be composed of multiple cells, may be multiple micro-class cells using the same frequency and the same scrambling code, or may be a micro-class cell that uses the same scrambling code and is adjacent to the source cell, and may also pass other A cell set consisting of a plurality of cells obtained in a form is not limited in the embodiment of the present invention.

 102. Receive a detection result sent by the candidate cell, and determine a target cell according to the detection result. Specifically, a cell with a signal quality higher than a specified threshold may be selected from candidate cells by using a detection result sent by the candidate cell, or a cell with a signal quality exceeding a certain threshold and returning the fastest, or a candidate cell may be selected from the candidate cells. The cell with the highest signal quality is selected as the target cell for UE handover. Of course, the target cell may also be selected according to other predetermined criteria, which is not limited in the embodiment of the present invention.

Further, as shown in FIG. 2, in order to be compatible with other existing switching mechanisms, if the handover request message is If you point to an explicit target cell, you can complete the switch according to the normal process without performing related operations on signal quality detection. Therefore, before performing step 101, the method may further include:

 And determining, according to the detection indication carried in the handover request message sent by the source node, whether to detect the uplink signal quality of the UE; if the handover request message carries the detection indication, performing step 104; if the handover request message is If the detection indication is not carried, step 105 is performed.

 The handover request message may be sent by the source node through a direct interface connected to the target node, or the source node may send a handover request message to the core network, and then the core network forwards the handover request message to the target node. Since the detection request sent by the source node to the target node may include the detection indication, the target node may directly obtain the detection indication from the handover request message. Alternatively, the source node may also send the information content in the detection indication by other means, and the target node acquires the information content to generate a detection indication and sends the detection indication to the candidate cell.

 And determining, according to whether the detection indication is present, whether the candidate cell needs to detect the signal quality of the UE, and determining, according to the uplink signal quality of the UE, the target cell when the detection indication exists; and not performing the detection indication when the indication does not exist. Uplink detection, direct switching. In addition, it is also possible to determine whether to perform uplink detection by using the detection request identifier in the detection indication. For example, the detection request identifier may be a Boolean identifier. When the detection request identifier is 1, the target node may enable the candidate cell to detect the signal quality of the UE, and select an appropriate target cell according to the detection result; when the detection request identifier When it is 0, the target node can directly obtain the target cell identifier from the handover request message, and switch the UE to the corresponding target cell. In addition, determining whether to perform uplink detection by detecting the target cell scrambling code carried in the indication, for example, if the handover request message carries the target cell scrambling code, the target node may determine the candidate cell set according to the target cell scrambling code, and After detecting the signal quality of the candidate cell, the target cell is selected; if the target cell scrambling code is not carried in the handover request message, the handover may be completed according to the existing handover procedure. Or determining whether to perform uplink detection by detecting a micro-class candidate cell set identifier carried in the indication, where the micro-class candidate cell set identifier is composed of a mapping value of the source cell identifier and a mapping value of the target cell scrambling code. It can be understood that the form of the detection indication for determining whether to perform the uplink quality detection includes, but is not limited to, the above forms, and may also be other forms of identification, and the embodiments of the present invention are no longer described.

 104. Determine the candidate cell according to the handover request message, and execute the sending a detection indication to the candidate cell.

The target node may determine, according to the target cell scrambling code carried in the handover request message, the candidate cell that shares the same scrambling code, or may be identified according to the micro-class cell collection identifier carried in the handover request message. A candidate cell. There may be multiple candidate cells, and when a detection indication is sent, a detection indication is sent to each of the plurality of candidate cells.

 Specifically, the method for determining the candidate cell may be: according to the handover request message sent by the source node, if the request message includes the source cell information, determining that the cell adjacent to the source cell is a candidate cell. The method for determining the candidate cell may also be: if the request message includes the scrambling code information of the target cell, determining that the cell that matches the received scrambling code information is a candidate cell. The method may further be: if the request message includes the scrambling code information and the source cell information of the target cell, determining that the cell adjacent to the source cell and having the same scrambling code as the received target cell is the candidate cell.

 105. Complete the switching according to the normal switching process.

 The normal handover procedure may be: acquiring the target cell identifier from the handover request message, and switching the UE to the corresponding target cell; or acquiring the target cell scrambling code, and sending the link to one of the micro-class cells corresponding to the target cell scrambling code. The establishment of the request and the completion of the subsequent handover, it can be understood that other handover procedures can be taken in the prior art, and the embodiments of the present invention are not described again.

 In this embodiment, the detection indication may include at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, frequency band information of an uplink frequency of the UE, configuration information of discontinuous transmission of the UE, Intra-frame timing offset information of the uplink dedicated physical control channel of the UE, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE uplink measurement amount, detection duration, continuous detection time, reporting threshold, etc. The information included in the detection indication includes, but is not limited to, the information element (IE) described above.

 Specifically, the information that the detection indication can include and the specific meaning of each information can be as shown in Table 1.

IE name Remarks

Maximum detection duration, for example: 40, 60, 80, 100, 120,

 140, 160 milliseconds, etc.

 UE uplink scrambling code

 Minimum uplink channelization code length of the UE

 The maximum number of uplink DPDCH channels of the UE

 UE punch limit

 The UE's uplink transport format combination set uses the radio link request in TS 25.433

 UL DPCH Information IE in the slot format information of the upper and lower DPCCH of the UE

Information about the uplink signal interference of the source cell than the target value

UE diversity mode Downstream power control mode of the source cell

The uplink cell of the source cell used to enhance DCH operation

Indicated by data channel

 The starting point of the UE uplink DPCCH frame is relative to the target

Chip offset of the PCCPCH frame of the cell

 Uplink frequency of the UE or downlink frequency of the source cell

Information

 Band indication information of the UE uplink frequency point

 UE discontinuous packet transmission mode configuration information

 Table 1

 The configuration information of the UE discontinuous packet transmission mode is used to configure UE detection for discontinuous packet transmission. In order to use the detection mode for the discontinuous packet transmission state when the UE is in the discontinuous packet transmission state, the configuration information of the UE discontinuous packet transmission mode may include one or more parameters in Table 2. In addition, the source cell notifies the UE to stop the mode of discontinuous packet transmission before initiating the handover, so that the candidate cell does not want to detect the UE based on the mode in which the UE transmits in the discontinuous packet.

 UE DTX DRX Offset

 The starting position of the discontinuous packet transmission

 Enabling Delay

 Delay the number of frames sent from consecutive transmissions to discontinuous transmissions

 DTX Information

 DTX information

 CHOICE E-DCH TTI

 CHOICE E-DCH TTI length

 Length

 If the TTI is 2 milliseconds

 UE DTX Cycle 1 Uplink UL DPCCH DTX Mode 1 Number of sub-frames of the next DTX cycle

 UE DTX Cycle 2 Uplink UL DPCCH DTX mode 2 Number of sub-frames of the next DTX cycle. (For E-DCH without uplink data transmission)

 MAC DTX Cycle MAC layer sends the length of the uplink E-DCH data

 If the TTI is 10 milliseconds

 UE DTX Cycle 1 UE DTX Cycle 1

 UE DTX Cycle 2 UE DTX Cycle 2

 MAC DTX Cycle MAC DTX Cycle

 Inactivity Threshold defines how much E-DCH TTI, CPC mode from

 For UE DTX Cycle 2

UE_DTX_cycle-1 to UE-DTX-cycle-2 UE DTX Long defines the number of pre-Preamble pilot slots to start transmitting in UE-DTX-cycle-2 mode (all values are used for UL DPCCH DTX and DL DRX)

 MAC Inactivity identifies the wait time required to initiate E-DCH inactivity

 Threshold

 CQI DTX Timer Description How many subframes have passed after receiving the data of the HS-DPSCH

 After that, the priority of the uplink transmission CQI report is increased, so that the CQI report is sent even in the gap of DTX.

 UE DPCCH burstl needs to transmit the number of subframes in UE_DTX_cycle-1 mode.

 (UE_DTX_cycle_ 1- UE-DPCCH_burst-1 is the number of subframes not transmitted)

 UE DPCCH burst2 needs to transmit the number of subframes in UE_DTX_cycle-2 mode.

 (UE_DTX_cycle_ 1- UE-DPCCH_burst-1 is the number of subframes not transmitted)

 Table 2

 It should be noted that, in the embodiment of the present invention, the information included in the detection indication sent by the target node to the candidate cell includes, but is not limited to, the foregoing content, and the corresponding content may be added or modified according to an actual situation. Not limited. Moreover, the content and the form of the information included in the detection indication may be pre-configured on the target node, or may be sent by the source node to the target node through the handover request message, or may be sent by the core network to the target node, and the configuration of the specific detection indication may be Source Mode The embodiments of the present invention are also not limited to 1.

 Another embodiment of the present invention provides a method for selecting a target cell, which can be applied to a target node side, as shown in FIG. In an application scenario of the embodiment of the present invention, the detection indication may be sent by detecting a dedicated message, so the steps 101-102 may also be implemented as follows:

 201. Send a detection specific message to the candidate cell, where the detection specific message carries the detection indication.

 Before requesting the candidate cell to prepare the radio link resource, the detection dedicated message carrying the detection indication may be used to indicate that the candidate cell detects the uplink signal quality of the UE to be handed over.

 202. Receive a detection-specific response message sent by the candidate cell, where the detection-specific response message includes the detection result.

 The detection specific response message may include a success response message of the detection result, or may be a response message of the detection failure.

203. Select, according to the detection result, a candidate cell that meets a predetermined criterion as the target cell. The detection result may be an indication that the UE is detected. Further, it may indicate that the uplink signal quality of the UE is higher than a certain threshold. The test results can also contain specific measurements.

 The detection result includes at least one of the following information: an indication exceeding a predetermined threshold, an indication of detecting the UE, a measurement value of an uplink signal of the specific UE, a length of time of detection, and a length of continuous detection time.

 If the target node receives the detection result sent by the multiple candidate cells, the multiple detection results may be compared, and the cell whose signal quality reaches a predetermined criterion is selected as the target cell. If the target node receives the message that the detection fails to be sent by the candidate cell, the candidate cell that fails the detection may be directly eliminated, and the target cell is selected from the other candidate cells. The predetermined criterion may be preset according to actual conditions. For example, the predetermined criterion may be that the signal quality is the highest, and the cell with the highest signal quality is selected from the candidate cells as the target cell. Alternatively, if the target node does not receive the detection result of a candidate cell within a predetermined time, the candidate cell may be abandoned and the target cell may be selected from other candidate cells. In addition, the predetermined criterion may be that the detection result is the fastest and the uplink signal quality of the UE is higher than a certain threshold, and the candidate cell with the fastest detection result and the uplink signal quality of the UE is higher than a certain threshold is selected as the target cell. Because the detection of the cell closest to the UE is generally the fastest. This way you can speed up the process of switching.

 Moreover, the measurement quantity of the signal quality can be pre-agreed, such as the uplink signal to noise ratio, reception, and the like. Specifically, if the target node only receives the detection result of one candidate cell, and the other candidate cells detect the failure or no response, the candidate cell of the unique feedback detection result may be determined as the target cell.

 204. Send a second link setup request message to the target cell, so that the target cell completes a subsequent handover procedure.

 The second link setup request message may be an existing radio link setup request message, used to initiate a handover to the target cell, and instruct the target cell to prepare radio link resources.

 As shown in FIG. 4, in another implementation scenario of the embodiment of the present invention, the target node may also send a detection indication to the candidate cell by using the first link setup request message, so the steps 101-102 may also be implemented as follows:

 301. Send a first link setup request message to the candidate cell, where the first link setup request message carries the detection indication.

The first link setup request message is a radio link setup request message that carries the detection indication after the detection indication is added to the existing radio link setup request message. The first link setup request message may initiate a handover to the candidate cell, indicating that the candidate cell prepares the radio link resource. At the same time, the candidate cell is also instructed to detect the signal quality of the UE to be handed over.

 302. Receive a first link setup response message or a link setup failure message sent by the candidate cell, where the first link setup response message and the link setup failure message include the detection result.

 The detection result may be an indication that the UE is detected, or the UE is not detected. Further, it may indicate that the uplink signal quality of the UE is higher than a certain threshold. The test results can also contain specific measurements.

 The first link setup response message is a radio link setup response message carrying the detection result obtained after the detection result is added to the existing radio link setup response message. The first link setup response message is sent by the candidate cell to the target node, and the target node may be notified that the radio link resource has been prepared, and the detection result is also sent to the target node. In addition, the link setup failure message may indicate that the uplink signal quality of the UE or the UE is not detected to be lower than a certain threshold.

 303. Select, as the target cell, a candidate cell that meets a predetermined criterion according to the detection result, and complete a subsequent handover process.

 The method of selecting the target cell from the candidate cells according to the detection result is the same as the method in step 203, and the measured measurement amount and the predetermined criterion for judging the signal quality may be defined in advance.

 304. Send a link deletion request message to other candidate cells except the target cell.

 In the embodiment of the present invention, the detection indication sent by the first link setup request message is performed, and the candidate cell not only completes the detection process, but also prepares resources, such as an interface, a signaling point, and a bandwidth, required for the handover. . Therefore, in order to prevent waste of resources, the target node may send a link deletion request to the other candidate cells if the radio resource resources have been prepared for the UE other than the target cell after determining the target cell. The message notifies the candidate cell that has prepared the radio link resource to cancel the allocated radio link resource, so that the candidate cell releases the resources for other services.

 Another embodiment of the present invention further provides a method for selecting a target cell, which can be applied to a base station side, as shown in FIG. 5.

 401. Receive a detection indication sent by the target node.

The detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, frequency band information of the uplink frequency of the UE, configuration information of the discontinuous transmission of the UE, and uplink dedicated physics of the UE. Intra-frame timing offset information of the control channel, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE uplink measurement amount, detection duration, continuous detection time, reporting threshold, detection request identifier, source cell Information, etc., the information included in the detection indication includes but is not limited to the above content, and the content of the detection indication may be added or modified according to actual conditions. Its The instructions that he does not list are the same as those in the first embodiment, and will not be described again.

 402. Detect, according to the detection indication, an uplink signal quality of the user equipment UE.

 The candidate cell may detect the UE according to the configuration information of the UE included in the detection indication, for example, the uplink scrambling code of the UE to be switched, and may also calculate the uplink signal frame of the UE according to the uplink frequency information of the UE and the intra-frame timing offset information. The starting position is to synchronize the detection signal with the uplink signal of the UE. The candidate cell may also perform quality detection of discontinuous transmission to the UE when the UE is in a discontinuous transmission state. By analogy, the candidate cell may further configure the detection parameter according to other information in the detection indication, and send the measurement result according to the measurement quantity indicated in the detection indication.

 403. Send a detection result to the target node.

 The detection result may be included in the detection specific response message, or may be sent to the target node in the first link setup response message, or may be sent to the target node through the link establishment failure message or the detection failure message. The detection result may include one or more of the following information: presence/absence of an indication of the detected UE, signal strength of the uplink DPCCH, signal to noise ratio SIR of the uplink DPCCH, an indication exceeding a predefined threshold, a duration of detection, and the like. The information contained in the detection result may be referred to in Table 3. The content of the information in the detection result may be added or modified according to the actual situation, which is not limited by the embodiment of the present invention.

 Another way of detecting the detection result is to send only the agreed-only dedicated response message, and the message may not include any of the foregoing detection results, and the target node is considered to be detecting the uplink of the UE as long as the target node receives the agreed-specific response message. Signal quality exceeds a certain threshold.

 table 3

 Further, as shown in FIG. 6, before the sending the detection result to the target node, the method for selecting the target cell may further include:

404. Determine, according to the detection result, whether the detection result is sent to the target node. If the detection result indicates that the uplink signal quality of the UE is not lower than the specified threshold, perform step 405; if the detection result indicates the uplink signal quality of the UE. If the threshold is lower than the specified threshold, step 406 is performed. After receiving the detection indication sent by the target node, the candidate cell detects the uplink signal quality of the UE to be switched according to the information and the configuration parameter in the detection indication. The candidate cell may select whether to feed back the detection result to the target node according to the detection result. If the uplink signal quality of the UE is not lower than the specified threshold, the detection result is sent to the target node; if the uplink signal quality of the UE is lower than the specified threshold, the candidate cell may not The target node sends the detection result, or sends the result of the detection failure to the target node to reduce the calculation amount of the target node.

 405. Send a detection result to the target node.

 The candidate cell may send the detection result to the target node by using different message forms in different application scenarios. For example, if the target node detects the detection indication sent by the dedicated message, the candidate cell carries the detection result in the detection-specific response message and sends it to the target node. If the target node passes the detection indication sent by the first link setup request message, the candidate cell carries the detection result in the first link setup response message and sends the result to the target node.

 Another way of detecting the detection result is to send only the first link setup response message, the message may not include any of the foregoing detection results, and the target node considers the detection as soon as it receives the first link setup response message. The uplink signal quality to the UE exceeds a certain threshold.

 406. Send a detection result to the target node, or send a message that the detection fails to the target node.

 If the candidate cell does not detect the UE to be handed over, or the detected UE signal quality is poor, the detection result may not be sent to the target node, or the detection failure message may be sent to the target node, or sent to the target node. Link establishment failure message. The link establishment failure message and the failure detection message may also include the detection result.

 For example, the candidate cell detects the UE according to the related configuration information of the UE included in the detection indication. However, if the signal of the UE is still not detected within the maximum detection duration, the detection failure message or the link establishment failure message may be sent to the target node. Alternatively, if the candidate cell detects the uplink signal quality of the UE and finds that the signal quality is lower than the predetermined standard and cannot guarantee good service, the detection result may not be sent to the target node, and the target node may automatically eliminate the detection result after receiving the detection result. Candidate cell.

 Another embodiment of the present invention provides a method for selecting a target cell, which can be applied to a base station side, as shown in FIG. In an application scenario of the embodiment of the present invention, the detection result may be sent to the target node by detecting the dedicated response message, so the steps 401-403 may also be implemented as follows:

501. Receive a detection-specific message sent by the target node, where the detection-specific message carries the detection indication. The candidate cell receives the target node to send a detection dedicated message, parses the detection indication from the detection dedicated message, and detects the UE to be handed over by using the relevant configuration information included in the detection indication.

 502. Detect, according to the detection indication, an uplink signal quality of the user equipment UE.

 503. Send a detection specific response message to the target node, where the detection specific response message includes the detection result.

 After the candidate cell detects the uplink signal quality of the UE according to the information in the detection indication, the measurement result is carried in the detection dedicated response message and sent to the target node. The information of the measurement results may be one or more of Table 3. The measurement quantity of the UE included in the detection result may be pre-agreed by the target node and the candidate cell, or may be determined from the detection indication. For example, the measurement quantity may be a signal to noise ratio of the uplink signal of the UE, etc., and the implementation of the present invention This example does not limit this.

 As shown in FIG. 8, in another implementation scenario of the embodiment of the present invention, the base station may also send the detection result to the target node by using the first link setup response message, so the steps 401-403 may also be implemented as follows:

 601. Receive a first link setup request message sent by the target node, where the first link setup request message carries the detection indication.

 The first link setup request message is sent by the target node to the candidate cell, and is a radio link setup request message carrying the detection indication obtained after the detection indication is added to the existing wireless link setup request message. After receiving the first link setup request message, the candidate cell not only prepares the corresponding radio link resource, but also detects the uplink signal quality of the UE to be handed over. The candidate cell may prepare the radio link resource for the U E after detecting that the uplink quality of the U E is above a certain threshold.

 602. Detect, according to the detection indication, an uplink signal quality of the user equipment UE.

 603. Prepare a radio link resource, and send a first link setup response message to the target node, where the first link setup response message includes the detection result.

 The first link setup response message is sent by the candidate cell to the target node, and is a radio link setup response message carrying the detection result after the detection result is added to the existing radio link setup response message. . The first link setup response message is sent by the candidate cell to the target node, and the target node may be notified of the relevant resources that are ready for handover, and the detection result is also sent to the target node.

604. Delete the prepared radio link resource according to the link deletion request message sent by the target node. For example, in a handover, two candidate cells are candidate cell 1 and candidate cell 2 respectively. If the target node finds that the signal quality of the candidate cell 1 is high according to the detection result, the candidate cell 1 is determined as the target cell, and the candidate is made. The cell 1 completes the subsequent handover work. If candidate cell 2 has been cut for this time After the allocated radio link resources are exchanged, the target node may send a link deletion request message to the candidate cell 2. After receiving the link deletion request message, the candidate cell 2 deletes the prepared radio link resources and releases the resources. For other services.

 Another embodiment of the present invention provides a method for selecting a target cell, which can be applied to a source node side, as shown in FIG.

 701. Send a handover request message to the target node according to the measurement report reported by the UE, where the handover request message includes a detection indication.

 In the embodiment of the present invention, when the target node cannot determine the unique target cell, the multiple candidate cells may detect the signal quality of the UE to select the target cell with good signal quality, and therefore the detection indication sent by the target node to the candidate cell is included. There are related configuration information for detection. In addition to being pre-configured on the target node, these configuration information can also be obtained from the source node.

 The source node is a controller of the serving cell where the UE to be switched is located, and may obtain an uplink scrambling code of the UE, a target cell scrambling code, and related configuration information of the UE, and the source control may send the configuration information to the handover request message. The target node can also deliver messages through dedicated configuration information or through system messages to the target node. The target node may generate the detection indication according to the received related configuration information, and send the detection indication to the candidate cell. Further, the handover request message may further include: a detection request identifier. The detection request identifier is used to indicate that the target node performs uplink signal quality detection on the UE.

 The detection request identifier may be added to the handover request message to indicate whether the target node needs to determine the target cell by detecting the signal quality of the UE. The detection identifier may be a Boolean cell, or a target cell identifier, or a target cell scrambling code. It is also possible to determine whether the target cell is to be determined by detecting the signal quality of the UE by detecting whether the presence of the identification is present, and when the detection request identifier is present, it is not necessary when the detection request identifier does not exist. For example, if the measurement report sent by the UE to the source node includes an explicit target cell identifier, and the source node may carry the target cell identifier in the handover request message and send the message to the target node, the target node may not detect the signal quality of the candidate cell. , complete the switch directly according to the normal process.

 Another embodiment of the present invention provides a target node, as shown in FIG. 10, including: a detecting unit 81 and a cell determining unit 82.

The detecting unit 81 is configured to send a detection indication to the candidate cell, and receive a detection result sent by the candidate cell, where the detection indication is used to indicate that the candidate cell detects the uplink signal quality of the user equipment UE. The cell determining unit 82 is configured to determine a target cell according to the detection result received by the detecting unit 81.

 Further, as shown in FIG. 11, the detecting unit 81 may include: a dedicated message sending module 811 and a dedicated feedback receiving module 812.

 The dedicated message sending module 811 is configured to send a detection dedicated message to the candidate cell, where the detection dedicated message carries the detection indication.

 The dedicated feedback receiving module 812 is configured to receive the detection specific response message sent by the candidate d, the area, where the detection specific response message includes the detection result.

 As shown in FIG. 12, in another implementation scenario of the embodiment of the present invention, the detecting unit 81 may further include: a first message sending module 813 and a first feedback receiving module 814.

 The first message sending module 813 is configured to send a first link setup request message to the candidate cell, where the first link setup request message carries the detection indication.

 The first feedback receiving module 814 is configured to receive a first link setup response message sent by the candidate cell, where the first link setup response message includes the detection result.

 Optionally, the cell determining unit 82 is further configured to: select, according to the detection result, a candidate cell with the fastest response whose signal quality exceeds a predetermined threshold as the target cell. Alternatively, the cell determining unit 82 is further configured to: select, according to the detection result, a candidate cell with the highest signal quality as the target cell.

 Further, in the implementation scenario as shown in FIG. 12, the target node may further include: deleting the unit

83.

 The deleting unit 83 is configured to send a link deletion request message to other candidate cells other than the target cell that have prepared radio link resources for the U E, so that the other candidate cells release the radio link resources prepared for the U E.

 Further, as shown in FIG. 13, the target node may further include: a source receiving unit 84, a candidate unit 85, and a normal switching unit 86.

 The source receiving unit 84 is configured to send, by the detecting unit 81, a detection indication to the candidate cell, and before receiving the detection result sent by the candidate cell, determine whether to detect the UE according to the detection identifier carried in the handover request message sent by the source node. Uplink signal quality.

 The candidate unit 85 is configured to determine, according to the handover request message, the candidate cell when the source receiving unit 84 determines that the handover request message carries the detection identifier.

The detecting unit 81 is further configured to send a detection indication to the candidate cell after the candidate unit 85 determines the candidate cell. The normal switching unit 86 is configured to complete the handover according to the normal handover procedure when the source receiving unit 84 determines that the detection identifier is not carried in the handover request message.

 It should be noted that the detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, frequency band information of an uplink frequency of the UE, configuration information of discontinuous transmission of the UE, and UE information. Intra-frame timing offset information of the uplink dedicated physical control channel, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE uplink measurement amount, detection duration, continuous detection time, reporting threshold, detection request identifier Source cell information.

 Another embodiment of the present invention further provides a base station, as shown in FIG. 14, comprising: a receiving unit 91, an uplink detecting unit 92, and a feedback unit 93.

 The receiving unit 91 is configured to receive a detection indication sent by the target node.

 The uplink detecting unit 92 is configured to detect an uplink signal quality of the user equipment UE according to the detection indication.

 The feedback unit 93 is configured to send a detection result to the target node.

 Further, as shown in FIG. 15, the receiving unit 91 includes: a dedicated receiving module 911. The dedicated receiving module 911 is configured to receive a detection dedicated message sent by the target node, where the detection dedicated message carries the detection indication.

 The feedback unit 93 is further configured to: send a detection specific response message to the target node, where the detection specific response message includes the detection result.

 Further, the base station may further include: a second response unit 94.

 The second response unit 94 is configured to determine whether the uplink signal quality of the UE is lower than a specified threshold before the feedback unit 93 sends the detection result to the target node.

 The feedback unit 93 is further configured to: when the UE uplink signal quality is not lower than a specified threshold, perform the sending a detection specific response message to the target node.

 The feedback unit 93 is further configured to: when the uplink signal quality of the UE is lower than a specified threshold, as shown in FIG. 16, in another implementation scenario of the embodiment of the present invention, the receiving unit 91 includes: A receiving module 912.

 The first receiving module 912 is configured to receive a first link setup request message sent by the target node, where the first link setup request message carries the detection indication.

The feedback unit 93 is further configured to: prepare a corresponding radio link resource, and send a first link setup response message to the target node, where the first link setup response message includes the detection result. Further, the base station may further include: a first response unit 95.

 The first response unit 95 is configured to determine, according to the detection result, whether to send the detection result to the target node before the feedback unit 93 sends the detection result to the target node.

 The feedback unit 93 is further configured to: when the uplink signal quality of the UE is not lower than a specified threshold, the feedback unit 93 is further configured to: when the uplink signal quality of the UE is lower than a specified threshold, The target node sends a first link setup response message, or sends a link setup failure message to the target node.

 Further, the base station may further include: a resource deleting unit 96.

 The resource deleting unit 96 is configured to delete the prepared radio link resource if the link deletion request message sent according to the target node is received after the feedback unit 93 sends the detection result to the target node.

 The detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, frequency band information of the uplink frequency of the UE, configuration information of the discontinuous transmission of the UE, and uplink dedicated physics of the UE. Intra-frame timing offset information of the control channel, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE uplink measurement amount, detection duration, continuous detection time, upper threshold, detection request identifier.

 Another embodiment of the present invention further provides a source node, as shown in FIG. 17, including: a handover request unit 1001.

 The handover request unit 1001 is configured to send a handover request message to the target node according to the measurement report on the UE, where the handover request message includes a detection indication.

 The detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, frequency band information of the uplink frequency of the UE, configuration information of the discontinuous transmission of the UE, and uplink dedicated physics of the UE. The intraframe timing offset information of the control channel, the slot format information of the uplink dedicated physical control channel of the UE, the scrambling code of the target cell, the UE uplink measurement amount, the detection duration, the continuous detection time, the reporting threshold, and the detection request identifier. The handover request message may further include: a detection request identifier, where the detection request identifier is used to indicate that the target node performs uplink signal quality detection on the UE.

 Another embodiment of the present invention further provides a system for selecting a target cell, as shown in FIG. 18, including: a target node 1101, a base station 1102, and a source node 1103.

The source node 1103 is configured to send a handover to the target node 1101 according to the measurement report reported by the UE. Request message.

 The target node 1101 is configured to send a detection indication to the candidate cell, and receive a detection result that is sent by the candidate cell, where the detection indication is used to indicate that the candidate cell detects an uplink signal quality of the user equipment UE, and is determined according to the detection result. Target cell.

 The base station 1102 is configured to receive a detection indication sent by the target node 1101, detect an uplink signal quality of the user equipment UE according to the detection indication, and send a detection result to the target node 1101.

 The target node, the source node, the base station, and the system for selecting the target cell according to the embodiment of the present invention, by allowing the candidate cell to detect the uplink signal quality of the UE to be handed over, select a candidate cell whose signal quality reaches a predetermined standard from the candidate cell according to the detection result. Compared with the method for selecting one of the candidate cells in the prior art as the target cell, the target cell can improve the success rate of the handover, and can select the target cell with higher signal quality for the UE.

 In addition, the present invention mainly determines the target cell by detecting the uplink quality of the UE, and can also be used for other scenarios that need to be similar to the handover scenario.

 It will be apparent to those skilled in the art that, for convenience and brevity of description, only the division of each functional module described above is exemplified. In practical applications, the above-mentioned function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise. The components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. Medium. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

 The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. The medium of the code.

 The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or some of the technical features are equivalently substituted; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A method for selecting a target cell, which is characterized by comprising:

 Sending a detection indication to the candidate cell, where the detection indication is used to indicate that the candidate cell detects the uplink signal quality of the user equipment UE;

 Receiving a detection result sent by the candidate cell, and determining a target cell according to the detection result.

 The method for selecting a target cell according to claim 1, wherein the sending the detection indication to the candidate cell includes:

 Sending a detection-specific message to the candidate cell, where the detection-specific message carries the detection indication; the receiving the detection result sent by the candidate cell includes:

 And receiving a detection-specific response message sent by the candidate cell, where the detection-specific response message includes the detection result.

 The method for selecting a target cell according to claim 1, wherein the sending the detection indication to the candidate cell includes:

 Sending a first link setup request message to the candidate cell, where the first link setup request message carries the detection indication;

 The receiving the detection result sent by the candidate cell includes:

 Receiving a first link setup response message sent by the candidate cell, where the first link setup response message includes the detection result.

 The method for selecting a target cell according to claim 3, wherein after determining the suitable target cell according to the detection result, the method further includes:

 If the candidate cells other than the target cell have prepared radio link resources for the UE, send a link deletion request message to the other candidate cells, so that the other candidate cells release the radio link prepared for the UE. Resources.

 The method for selecting a target cell according to claim 1, wherein the determining the target cell according to the detection result includes:

 Selecting, as the target cell, a candidate cell with the highest signal quality according to the detection result;

 Alternatively, a candidate cell whose signal quality exceeds a predetermined threshold is selected as the target cell according to the detection result.

 The method for selecting a target cell according to claim 1, wherein before transmitting the detection indication to the candidate cell and receiving the detection result sent by the candidate cell, the method further includes:

Receiving a handover request message sent by the source node; And if the detection request carries the detection indication, determining the candidate cell according to the handover request message, and performing the sending a detection indication to the candidate cell.

 7. A method for selecting a target cell, the method comprising:

 Receiving a detection indication sent by the target node;

 Detecting, according to the detection indication, an uplink signal quality of the user equipment UE;

 Sending a detection result to the target node.

 The method for selecting a target cell according to claim 7, wherein the receiving the detection indication sent by the target node comprises:

 Receiving a detection dedicated message sent by the target node, where the detection dedicated message carries the detection indication;

 The sending the detection result to the target node is: sending a detection specific response message to the target node, where the detection specific response message includes the detection result.

 The method for selecting a target cell according to claim 8, wherein before the sending the detection result to the target node, the method further includes:

 And if the UE uplink signal quality is not lower than the designated gate, performing the detecting dedicated response message that sends the detection success to the target node.

 The method for selecting a target cell according to claim 7, wherein the detecting indication sent by the receiving target node includes:

 Receiving a first link setup request message sent by the target node, where the first link setup request message carries the detection indication;

 The sending the detection result to the target node is: preparing a radio link resource, and sending a first link setup response message to the target node, where the first link setup response message includes the detection result.

 The method for selecting a target cell according to claim 10, further comprising: before sending the detection result to the target node,

 And preparing the radio link resource and sending a first link setup response message to the target node if the UE uplink signal quality is not lower than the specified threshold.

 The method for selecting a target cell according to claim 10, further comprising: after preparing the wireless link resource and sending the first link setup response message to the target node, the method further includes:

 Receiving a link deletion request message sent by the target node, and deleting the prepared radio link resource.

The method of selecting a target cell according to any one of claims 7 to 12, characterized in that The detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, frequency band information of an uplink frequency of the UE, configuration information of discontinuous transmission of the UE, and an uplink dedicated physical control channel of the UE. Intraframe timing offset information, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE uplink measurement amount, detection duration, continuous detection time, reporting threshold, detection request identifier, and source cell information.

 A method for selecting a target cell, comprising:

 Sending a handover request message to the target node according to the measurement report reported by the UE, where the handover request message includes a detection indication.

 The method for selecting a target cell according to claim 14, wherein the detection indication comprises at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, and a frequency band in which the uplink frequency of the UE is located. Information, configuration information of discontinuous transmission of the UE, intra-frame timing offset information of the uplink dedicated physical control channel of the UE, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE uplink measurement quantity, Detection duration, continuous detection time, reporting threshold, detection request identifier, source cell information.

 16. A target node, comprising:

 a detecting unit, configured to send a detection indication to the candidate cell, and receive a detection result sent by the candidate cell, where the detection indication is used to indicate that the candidate cell detects an uplink signal quality of the user equipment UE, and the cell determining unit is configured to The detection result received by the detecting unit determines a target cell.

The target node according to claim 16, wherein the detecting unit comprises: a dedicated message sending module, configured to send a detection specific message to the candidate cell, where the detection specific message carries the detection indication;

 And a dedicated sending and receiving module, configured to receive a detection-specific response message sent by the candidate cell, where the detection-specific response message includes the detection result.

 The target node according to claim 16, wherein the detecting unit further comprises: a first message sending module, configured to send a first link setup request message to the candidate cell, where the first link is established The request message carries the detection indication;

 And a first feedback receiving module, configured to receive a first link setup response message sent by the candidate cell, where the first link setup response message includes the detection result.

 The target node according to claim 18, further comprising:

a deleting unit, configured to send a link deletion request message to other candidate cells other than the target cell that have prepared radio link resources for the UE, so that the other candidate cells are released for UE preparation Wireless link resources.

 The target node according to claim 15, wherein the cell determining unit is further configured to: select a candidate cell with the highest signal quality as the target cell according to the detection result, or select a signal quality according to the detection result. A candidate cell exceeding a predetermined threshold is used as a target cell.

 The target node according to claim 15, further comprising:

 The source receiving unit is configured to send, by the detecting unit, a detection indication to the candidate cell, and before receiving the detection result sent by the candidate cell, determine, according to the detection identifier carried in the handover request message sent by the source node, whether to detect the uplink of the UE. Signal quality;

 a candidate unit, configured to determine, according to the handover request message, the candidate cell when the determining unit determines that the handover request message carries the detection indication;

 The detecting unit is further configured to: after the candidate unit determines the candidate cell, send a detection indication to the candidate cell;

 The normal switching unit is configured to complete the handover according to the normal handover procedure when the determining unit determines that the detection request message does not carry the detection indication.

 The target node according to any one of claims 16 to 21, wherein the detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, and uplink of the UE. Band information in which the frequency is located, configuration information of the discontinuous transmission of the UE, intra timing offset information of the uplink dedicated physical control channel of the UE, slot format information of the uplink dedicated physical control channel of the UE, scrambling code of the target cell, UE Uplink measurement, detection duration, continuous detection time, reporting threshold, detection request identifier, source cell information.

 A base station, comprising:

 a receiving unit, configured to receive a detection indication sent by the target node;

 An uplink detecting unit, configured to detect an uplink signal quality of the user equipment UE according to the detection indication, and a feedback unit, configured to send a detection result to the target node.

 The base station according to claim 23, wherein the receiving unit comprises: a dedicated receiving module, configured to receive a detection dedicated message sent by the target node, where the detection specific message carries the detection indication;

 The feedback unit is further configured to: send a detection specific response message to the target node, where the detection specific response message includes the detection result.

 The base station according to claim 24, further comprising:

a second response unit, configured to send, before the feedback unit sends the detection result to the target node, Determining whether the uplink signal quality of the UE is lower than a specified threshold;

 The feedback unit is further configured to: when the uplink signal quality of the UE is not lower than a specified threshold, perform the detecting specific response message that is sent to the target node to be successfully detected.

 The base station according to claim 23, wherein the receiving unit comprises: a first receiving unit, configured to receive a first link setup request message sent by the target node, the first link setup request message Carrying the detection indication;

 The feedback unit is further configured to: prepare a radio link resource, and send a first link setup response message to the target node, where the first link setup response message includes the detection result.

 The base station according to claim 26, further comprising:

 a first response unit, configured to determine, according to the detection result, whether to send a detection result to the target node, before the feedback unit sends the detection result to the target node;

 The feedback unit is further configured to: when the uplink signal quality of the UE is not lower than a specified threshold, perform the preparing a radio link resource and send a first link setup response message to the target node.

 The base station according to claim 26, further comprising:

 And a resource deleting unit, configured to delete the prepared radio link resource if the link deletion request message sent by the target node is received after the feedback unit sends the detection result to the target node.

 The base station according to any one of claims 23 to 28, wherein the detection indication includes at least one of the following information: an uplink scrambling code of the UE, uplink frequency information of the UE, and an uplink frequency of the UE. The frequency band information, the configuration information of the discontinuous transmission of the UE, the intra-frame timing offset information of the uplink dedicated physical control channel of the UE, the slot format information of the uplink dedicated physical control channel of the UE, the scrambling code of the target cell, and the uplink of the UE Measurement amount, detection duration, continuous detection time, reporting threshold, detection request identification.

 30. A source node, comprising:

 The handover requesting unit is configured to send a handover request message to the target node according to the measurement report reported by the UE, where the handover request message includes a detection indication.

 31. A system for selecting a target cell, comprising:

 A target node according to any one of claims 16-22;

 A base station according to any one of claims 23-29;

 A source node as described in claim 30.